summaryrefslogtreecommitdiff
path: root/source4/script/w32err_code.py
blob: cad6f6ecc9f336a570560369e7aa1ccb2245dceb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
#!/usr/bin/python

# Unix SMB/CIFS implementation.
# Copyright (C) Kamen Mazdrashki <kamen.mazdrashki@postpath.com> 2009
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

"""Import generete werror.h/doserr.c files from WSPP HTML"""

import re
import os
import sys
import urllib
import pprint
from xml.dom import minidom
from optparse import OptionParser, OptionGroup

_wspp_werror_url = 'http://msdn.microsoft.com/en-us/library/cc231199%28PROT.10%29.aspx'

class WerrorHtmlParser(object):
    """
    Parses HTML from WSPP documentation generating dictionary of
    dictionaries with following keys:
      - "err_hex" - hex number (as string)
      - "err_name" - error name
      - "err_desc" - error long description
    For the key of returned dictionary err_hex is used,
    i.e. "hex-error-code-str" => {error dictionary object}
    """

    ERROR_PREFIX = ['ERROR_', 'NERR_', 'FRS_', 'RPC_', 'EPT_', 'OR_', 'WAIT_TIMEOUT']
    ERROR_REPLACE = ['ERROR_']

    def __init__(self, opt):
        self.opt = opt
        self._errors_skipped = []
        pass

    def _is_error_code_name(self, err_name):
        for pref in self.ERROR_PREFIX:
            if err_name.startswith(pref):
                return True
        return False

    def _make_werr_name(self, err_name):
        err_name = err_name.upper()
        for pref in self.ERROR_REPLACE:
            if err_name.startswith(pref):
                return err_name.replace(pref, 'WERR_', 1)
        return 'WERR_' + err_name

    def parse_url(self, url):
        errors = {}
        html = self._load_url(url)

        # let minidom to parse the tree, should be:
        # table -> tr -> td
        #     p -> [hex code, br, error code]
        #     p -> [description]
        table_node = minidom.parseString(html)
        for row_node in table_node.getElementsByTagName("tr"):
            # verify we got right number of td elements
            td_nodes = row_node.getElementsByTagName('td')
            if len(td_nodes) != 2:
                continue
            # now get the real data
            p_nodes = row_node.getElementsByTagName('p')
            if len(p_nodes) != 2:   continue
            if len(p_nodes[0].childNodes) != 3: continue
            if len(p_nodes[1].childNodes) != 1: continue
            err_hex = str(p_nodes[0].childNodes[0].nodeValue)
            err_name = str(p_nodes[0].childNodes[2].nodeValue)
            err_desc = p_nodes[1].childNodes[0].nodeValue.encode('utf-8')
            err_desc = err_desc.replace('"', '\\"').replace("\'", "\\'")
            # do some checking
            if not err_hex.startswith('0x'):    continue
            if not self._is_error_code_name(err_name):
                self._errors_skipped.append("%s - %s - %d" % (err_name, err_hex, int(err_hex, 16)))
                continue
            # create entry
            err_name = self._make_werr_name(err_name)
            err_def = {'err_hex': err_hex,
                       'err_name': err_name,
                       'err_desc': err_desc,
                       'code': int(err_hex, 16)}
            errors[err_def['code']] = err_def

        # print skipped errors
        if self.opt.print_skipped and len(self._errors_skipped):
            print "\nErrors skipped during HTML parsing:"
            pprint.pprint(self._errors_skipped)
            print "\n"

        return errors

    def _load_url(self, url):
        html_str = ""
        try:
            fp = urllib.urlopen(url)
            for line in fp:
                html_str += line.strip()
            fp.close()
        except IOError, e:
            print "error loading url: " + e.strerror
            pass

        # currently ERROR codes are rendered as table
        # locate table chunk with ERROR_SUCCESS
        html = [x for x in html_str.split('<table ') if "ERROR_SUCCESS" in x]
        html = '<table ' + html[0]
        pos = html.find('</table>')
        if pos == -1:
            return '';
        html = html[:pos] + '</table>'

        # html clean up
        html = re.sub(r'<a[^>]*>(.*?)</a>', r'\1', html)

        return html


class WerrorGenerator(object):
    """
    provides methods to generate parts of werror.h and doserr.c files
    """

    FNAME_WERRORS   = 'w32errors.lst'
    FNAME_WERROR_DEFS  = 'werror_defs.h'
    FNAME_DOSERR_DEFS = 'doserr_defs.c'
    FNAME_DOSERR_DESC = 'doserr_desc.c'

    def __init__(self, opt):
        self.opt = opt
        self._out_dir = opt.out_dir
        pass

    def _open_out_file(self, fname):
        fname = os.path.join(self._out_dir, fname)
        return open(fname, "w")

    def _gen_werrors_list(self, errors):
        """uses 'errors' dictionary to display list of Win32 Errors"""

        fp = self._open_out_file(self.FNAME_WERRORS)
        for err_code in sorted(errors.keys()):
            err_name = errors[err_code]['err_name']
            fp.write(err_name)
            fp.write("\n")
        fp.close()

    def _gen_werror_defs(self, errors):
        """uses 'errors' dictionary to generate werror.h file"""

        fp = self._open_out_file(self.FNAME_WERROR_DEFS)
        for err_code in sorted(errors.keys()):
            err_name = errors[err_code]['err_name']
            err_hex = errors[err_code]['err_hex']
            fp.write('#define %s\tW_ERROR(%s)' % (err_name, err_hex))
            fp.write("\n")
        fp.close()

    def _gen_doserr_defs(self, errors):
        """uses 'errors' dictionary to generate defines in doserr.c file"""

        fp = self._open_out_file(self.FNAME_DOSERR_DEFS)
        for err_code in sorted(errors.keys()):
            err_name = errors[err_code]['err_name']
            fp.write('\t{ "%s", %s },' % (err_name, err_name))
            fp.write("\n")
        fp.close()

    def _gen_doserr_descriptions(self, errors):
        """uses 'errors' dictionary to generate descriptions in doserr.c file"""

        fp = self._open_out_file(self.FNAME_DOSERR_DESC)
        for err_code in sorted(errors.keys()):
            err_name = errors[err_code]['err_name']
            fp.write('\t{ %s, "%s" },' % (err_name, errors[err_code]['err_desc']))
            fp.write("\n")
        fp.close()

    def _lookup_error_by_name(self, err_name, defined_errors):
        for err in defined_errors.itervalues():
            if err['err_name'] == err_name:
                return err
        return None

    def _filter_errors(self, errors, defined_errors):
        """
        returns tuple (new_erros, diff_code_errors, diff_name_errors)
        new_errors - dictionary of errors not in defined_errors
        diff_code_errors - list of errors found in defined_errors
                           but with different value
        diff_name_errors - list of errors found with same code in
                            defined_errors, but with different name
        Most critical is diff_code_errors list to be empty!
        """
        new_errors = {}
        diff_code_errors = []
        diff_name_errors = []
        for err_def in errors.itervalues():
            add_error = True
            # try get defined error by code
            if defined_errors.has_key(err_def['code']):
                old_err = defined_errors[err_def['code']]
                if err_def['err_name'] != old_err['err_name']:
                    warning = {'msg': 'New and Old errors has different error names',
                               'err_new': err_def,
                               'err_old': old_err}
                    diff_name_errors.append(warning)

            # sanity check for errors with same name but different values
            old_err = self._lookup_error_by_name(err_def['err_name'], defined_errors)
            if old_err:
                if err_def['code'] != old_err['code']:
                    warning = {'msg': 'New and Old error defs has different error value',
                               'err_new': err_def,
                               'err_old': old_err}
                    diff_code_errors.append(warning)
                # exclude error already defined with same name
                add_error = False
            # do add the error in new_errors if everything is fine
            if add_error:
                new_errors[err_def['code']] = err_def
            pass
        return (new_errors, diff_code_errors, diff_name_errors)

    def generate(self, errors):
        # load already defined error codes
        werr_parser = WerrorParser(self.opt)
        (defined_errors,
         no_value_errors) = werr_parser.load_err_codes(self.opt.werror_file)
        if not defined_errors:
            print "\nUnable to load existing errors file: %s" % self.opt.werror_file
            sys.exit(1)
        if self.opt.verbose and len(no_value_errors):
            print "\nWarning: there are errors defines using macro value:"
            pprint.pprint(no_value_errors)
            print ""
        # filter generated error codes
        (new_errors,
         diff_code_errors,
         diff_name_errors) = self._filter_errors(errors, defined_errors)
        if diff_code_errors:
            print("\nFound %d errors with same names but different error values! Aborting."
                  % len(diff_code_errors))
            pprint.pprint(diff_code_errors)
            sys.exit(2)

        if diff_name_errors:
            print("\nFound %d errors with same values but different names (should be normal)"
                  % len(diff_name_errors))
            pprint.pprint(diff_name_errors)

        # finally generate output files
        self._gen_werror_defs(new_errors)
        self._gen_doserr_defs(new_errors)
        self._gen_werrors_list(errors)
        self._gen_doserr_descriptions(errors)
        pass

class WerrorParser(object):
    """
    Parses errors defined in werror.h file
    """

    def __init__(self, opt):
        self.opt = opt
        pass

    def _parse_werror_line(self, line):
        m = re.match('#define[ \t]*(.*?)[ \t]*W_ERROR\((.*?)\)', line)
        if not m or (len(m.groups()) != 2):
            return None
        if len(m.group(1)) == 0:
            return None
        if str(m.group(2)).startswith('0x'):
            err_code = int(m.group(2), 16)
        elif m.group(2).isdigit():
            err_code = int(m.group(2))
        else:
            self.err_no_values.append(line)
            return None
        return {'err_name': str(m.group(1)),
                'err_hex': "0x%08X" % err_code,
                'code': err_code}
        pass

    def load_err_codes(self, fname):
        """
        Returns tuple of:
            dictionary of "hex_err_code" => {code, name}
                "hex_err_code" is string
                "code" is int value for the error
            list of errors that was ignored for some reason
        """
        # reset internal variables
        self.err_no_values = []
        err_codes = {}
        fp = open(fname)
        for line in fp.readlines():
            err_def = self._parse_werror_line(line)
            if err_def:
                err_codes[err_def['code']] = err_def
        fp.close();
        return (err_codes, self.err_no_values)



def _generate_files(opt):
    parser = WerrorHtmlParser(opt)
    errors = parser.parse_url(opt.url)

    out = WerrorGenerator(opt)
    out.generate(errors)
    pass


if __name__ == '__main__':
    _cur_dir = os.path.abspath(os.path.dirname(__file__))
    opt_parser = OptionParser(usage="usage: %prog [options]", version="%prog 0.3")
    opt_group = OptionGroup(opt_parser, "Main options")
    opt_group.add_option("--url", dest="url",
                         default=_wspp_werror_url,
                         help="url for w32 error codes html - may be local file")
    opt_group.add_option("--out", dest="out_dir",
                         default=_cur_dir,
                         help="output dir for generated files")
    opt_group.add_option("--werror", dest="werror_file",
                         default=os.path.join(_cur_dir, 'werror.h'),
                         help="path to werror.h file")
    opt_group.add_option("--print_skipped",
                        action="store_true", dest="print_skipped", default=False,
                        help="print errors skipped during HTML parsing")
    opt_group.add_option("-q", "--quiet",
                        action="store_false", dest="verbose", default=True,
                        help="don't print warnings to stdout")

    opt_parser.add_option_group(opt_group)

    (options, args) = opt_parser.parse_args()

    # add some options to be used internally
    options.err_defs_file = os.path.join(options.out_dir, WerrorGenerator.FNAME_WERROR_DEFS)
    options.dos_defs_file = os.path.join(options.out_dir, WerrorGenerator.FNAME_DOSERR_DEFS)
    options.dos_desc_file = os.path.join(options.out_dir, WerrorGenerator.FNAME_DOSERR_DESC)

    # check options
    _generate_files(options)